/*!
  * $script.js JS loader & dependency manager
  * https://github.com/ded/script.js
  * (c) Dustin Diaz 2014 | License MIT
  */

(function (name, definition) {
  if (typeof module != 'undefined' && module.exports) module.exports = definition()
  else if (typeof define == 'function' && define.amd) define(definition)
  else this[name] = definition()
})('$script', function () {
  var doc = document
    , head = doc.getElementsByTagName('head')[0]
    , s = 'string'
    , f = false
    , push = 'push'
    , readyState = 'readyState'
    , onreadystatechange = 'onreadystatechange'
    , list = {}
    , ids = {}
    , delay = {}
    , scripts = {}
    , scriptpath
    , urlArgs

  function every(ar, fn) {
    for (var i = 0, j = ar.length; i < j; ++i) if (!fn(ar[i])) return f
    return 1
  }
  function each(ar, fn,force) {
    every(ar, function (el) {
      return !fn(el,force)
    })
  }

  function $script(paths, idOrDone, optDone,force) {
    paths = paths[push] ? paths : [paths]
    var idOrDoneIsDone = idOrDone && idOrDone.call
      , done = idOrDoneIsDone ? idOrDone : optDone
      , id = idOrDoneIsDone ? paths.join('') : idOrDone
      , queue = paths.length
    function loopFn(item) {
      return item.call ? item() : list[item]
    }
    function callback() {
      if (!--queue) {
        list[id] = 1
        done && done()
        for (var dset in delay) {
          every(dset.split('|'), loopFn) && !each(delay[dset], loopFn) && (delay[dset] = [])
        }
      }
    }
    function removejscssfile(filename, filetype){
    	var targetelement=(filetype=="js")? "script" : (filetype=="css")? "link" : "none"
    	var targetattr=(filetype=="js")? "src" : (filetype=="css")? "href" : "none"
    	var allsuspects=document.getElementsByTagName(targetelement)
    	for (var i=allsuspects.length; i>=0; i--){
    	if (allsuspects[i] && allsuspects[i].getAttribute(targetattr)!=null && allsuspects[i].getAttribute(targetattr).indexOf(filename)!=-1)
    	   allsuspects[i].parentNode.removeChild(allsuspects[i])
    	}
    }
    setTimeout(function () {
      each(paths, function loading(path, force) {
        if (path === null) return callback()
        
        if (!force && !/^https?:\/\//.test(path) && scriptpath) {
          path = (path.indexOf('.js') === -1) ? scriptpath + path + '.js' : scriptpath + path;
        }
        if(force){
        	scripts[path] = {};
        	removejscssfile(path,"js");
            for(var i in scripts) {//不使用过滤
            	var obj = scripts[i];
            	if(obj.force){
            		removejscssfile(i,"js");
            		scripts[i] = {};
            	}
            }    
        }
        if (scripts[path] && scripts[path].flag) {
          if (id) ids[id] = 1
          return (scripts[path].flag == 2) ? callback() : setTimeout(function () { loading(path, true) }, 0)
        }
        scripts[path] = {};
    	scripts[path].force = force;
        scripts[path].flag = 1
        if (id) ids[id] = 1
        create(path, callback)
      },force)
    }, 0)
    return $script
  }

  function create(path, fn) {
    var el = doc.createElement('script'), loaded
    el.onload = el.onerror = el[onreadystatechange] = function () {
      if ((el[readyState] && !(/^c|loade/.test(el[readyState]))) || loaded) return;
      el.onload = el[onreadystatechange] = null
      loaded = 1
      scripts[path].flag = 2
      fn()
    }
    el.async = 1
    el.src = urlArgs ? path + (path.indexOf('?') === -1 ? '?' : '&') + urlArgs : path;
    head.insertBefore(el, head.lastChild)
  }

  $script.get = create

  $script.order = function (scripts, id, done) {
    (function callback(s) {
      s = scripts.shift()
      !scripts.length ? $script(s, id, done) : $script(s, callback)
    }())
  }

  $script.path = function (p) {
    scriptpath = p
  }
  $script.urlArgs = function (str) {
    urlArgs = str;
  }
  $script.ready = function (deps, ready, req) {
    deps = deps[push] ? deps : [deps]
    var missing = [];
    !each(deps, function (dep) {
      list[dep] || missing[push](dep);
    }) && every(deps, function (dep) {return list[dep]}) ?
      ready() : !function (key) {
      delay[key] = delay[key] || []
      delay[key][push](ready)
      req && req(missing)
    }(deps.join('|'))
    return $script
  }

  $script.done = function (idOrDone) {
    $script([null], idOrDone)
  }

  return $script
});
